Re: [CAD_CAM_EDM_DRO] Servo motor torque curves and duty cycle info

Ed Fanta wrote:

>William Scalione wrote:
>
>
>>Hi Kim,
>>
>>It's a small Dyna-Myte 2000, and I am going with a 3 to 1 belt drive. No
>>amps yet, but have tested it with the power supply connected directly to the
>>motors and it seems to move at about 60 IPM with plenty of torque.
>>
>>Bill
>>
>>
>
>
>CAUTION CAUTION CAUTION I managed to kill two servo motors by hooking
>the power supply directly to the motors to check out speeds and torque,
>cost me over $500 dollars to get them repaired. Lesson learned. Ed.
>
>

Servo motors have very strict current limits. They must NEVER be connected
to a power source with unlimited current capacity. The short current surge
when the voltage is applied to the stationary motor will "erase" the
permanent
magnets, reducing the torque partially or completely to zero.

Jon